Nothing amazingly innovative, but I've used it a lot at work. For simple jobs/event processing it is amazing as it removes a load of complexity (logging, monitoring, scaling, deploying).

Lambdas tend to be < 100 lines of Javascript which means maintenance and rewriting is trivial. And because the jobs are so simple people don't need to be Javascript experts or aware of the JS ecosystem to write them.

Lambda is also very cheap if you have bursty or just very low-volume workloads.